Grab-hook.



LC. MCPHERSON.

GRAB Hook.

PPLICATION FILED OCT. 23. 1 916- Patented Oct. 16, 12H7.

CICA

COLUMBUS MCPHERSON, on niioo'no, COLORADO;

GRAB-noon'.

nasser?.

Specification of Letters Patenti Patented oct. ie, reir.

`Appncanoii inea October z3, 191e. semaine. 12a-,2621

To @ZZ whom, t may conce/rn.'

Be it known that I, CoLUMUsMoPrmR- son, citizen of the United States, residing at the city of Dacono and State of Colorado,

" have invented certain new and useful, lm-

provelnents in rGrab-Hooks; and l do declare the following to be a full, clear, and exact description oi' the invention, such as will enable others skilled in the art to which it appertains yto make and use the same, reference being' had to the accompanying drawings, and to thecharacters Vof reference marked thereon, which forma part of this specification. y K

rll`he present invention relates to improvements in well appliances and pertains'more particularly to an improved grab hook adapted for use in withdrawing `articles from the bottom oit a well.

it frequently happens in the installation and use of pumps in a well, that the sucker rod becomes broken at some point below the surface of the ground and drops to the bottom from which position itis extremely dii'licult to recover. rl`he principal object of the present invention is to provide an improved attachment, which may conveniently be termed a grab hook and which can be removably secured to the lower end of the inner pipe section and lowered into operative position to engage the dislodged part of the broken member; A further object of the invention consists in providing this member with a loosely carried gripping device which engages the broken rod or other member and firmly clamps it until the part on which it is carried has been sutiiciently elevated above the surface of the ground.

With these and other objects in view the invention consists in the combination and arrangement of parts more fully set forth in the following speciiication, illustrated in the accompanying drawing and more particularly pointed out in the appended claims.

ln the drawings y Figure 1 is a vertical transverse sectional view taken through the lower portion ot a well and pump of the deep well type.

Fig. 2 is a similar view showing one embodiment of the present invention applied to the lower end of of the pump cylinder, the sucker rod of the pump being shown as broken and dropped to the bottom of the well.

Fig. 3 is a view similar to Fig. 2, but` showing the parts in differentl relative positions, and

Fig. e is a transverse horizontal section o1 the invention, taken on the line 4%, looking downward in the direction of the arrows.

Referring now to the drawing, in Fig. 1 is shown a lower fragmental vfiewot a deep well the cylindrical casing 5 ,of which is provided with ,an end strainer member 6. lithint-he well casing 5 is the pump cylinder composed ot a plurality of connected sectionswthe lowermost 7 of which carries lthe intal'ne check valve 8. The pump valves 9 are secured to the lower end of the Apump or sucker7 rod l0. It'not infrequently happens that this rod breaks and :generally at` a place considerably below the surface of the ground. The result is, the weight of the loosened portion of the rodvcrashes downwardly through the lower end of the pump breaking away the valve structure 8. Great difficulty has been experienced in extricating such a broken part from the bottom of a deep well. According to the present invention the pump casing is withdrawn and a cylindrical member' 11 is screwthreaded onto the lower pump section as shown in Figs. 2 and 3. This cylindrical member 11 is hollow and its bottom edge is outwardly iiared as shown at 12 to form a bell like end. Rigidly carried at the inner side of the casing member is a depending hook member 13. A pivoted gripping member' 14 is provided within the cylindrical member 11 and is formed with a pair of outwardly projecting oppositely disposed lugs 15 which engage slightly elongated slots 1G in the walls of the casing 11. This member 1i is formed witlf its outer edges conforming to the contour ot the inside of the casing 11 and is of suiiicient area to eX- tend approximately two-thirds of the way across the casing. Its outer edge 17 which is sharpened or beveled as in Fig. 4. is slightly wider than the cross section of the casing` 11 at this point and hence it is impossible for this member to drop into the horizontal position. The pump casing 7 with the member 11 applied thereto is inserted in the well until the depending hook 13 is lowered sufficiently to engage the broken part of the sucker rod 10. The well casing is then turned in either direction whereupon the hook 13 will contact with and move the upper end of the broken rod into the path of the lower bell 12 of the casing 1l. The casing 1l is then lowered until the upper end of the rod l() passes upwardly into the cylindrical member and assumes `approximately the position illustrated in Fig. 3. It willthere be seen that the rod l0 causes the pivoted gripping member la to be swung slightly upwardly and hence any upward movement exerted on the well casing 7 will cause the member la to grip one edge of the pipe or rod'stem 10 while the opposite sideof the stem l0 will at the same time be clamped against the inner wall of the casing 7 or member 11 as the case may be. The pump casing may now be steadily withdrawn and the rod l0 or the broken portionthereof will be brought up to the surface of the ground.

lt will thus be seen that avery simple, cheapv and effective Vmeans is provided for extricating from the bottom of a deep well v a broken part which otherwise might cause serious delay and'possible abandonment of the well.

Having described my invention what I claim is:

l. The combination with the pump casing ape of this patent may be obtained for of a well, of a grab hook removably carried at the lower end of the casing and depending therefrom for facilitating the removal of an obstruction at the well bottom.

2, The combination with the pump casing of a well, of a hollow section removably carried thereon, having a grab hook depending therefrom and a pivoted gripping member cooperating therewith for facilitating the removal of an obstruction at t Te well bottom.

8. The combination with the pump casing of a well, of a hollow cylindrical Section removably carried thereon, said section having a lower bell shaped end7 a depending grab hook rigidly carried by said Section anda pivoted gripping member within said section and ooperating with said grab hook to facilitate the withdrawal of an obstacle from the well bottom.

In testimony whereof I aflix my signature, in presence of two witnesses.

COLUMBUS MGPHERSON.

Witnesses CHARLES E. PARSONS, HELEN A. VILLEMAGNE.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

